CN104849655B - Extra-high voltage ice-melt disconnecting switch heavy current tester and test method - Google Patents
Extra-high voltage ice-melt disconnecting switch heavy current tester and test method Download PDFInfo
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- CN104849655B CN104849655B CN201510169573.1A CN201510169573A CN104849655B CN 104849655 B CN104849655 B CN 104849655B CN 201510169573 A CN201510169573 A CN 201510169573A CN 104849655 B CN104849655 B CN 104849655B
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- 238000010998 test method Methods 0.000 title claims abstract description 17
- 238000012360 testing method Methods 0.000 claims abstract description 63
- 230000033228 biological regulation Effects 0.000 claims abstract description 5
- 238000002844 melting Methods 0.000 claims description 8
- 230000008018 melting Effects 0.000 claims description 8
- 238000003556 assay Methods 0.000 claims description 6
- 238000000034 method Methods 0.000 abstract description 2
- 230000005540 biological transmission Effects 0.000 description 4
- 238000001816 cooling Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000002679 ablation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004870 electrical engineering Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000004995 multiple fission Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
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Abstract
The invention discloses a kind of extra-high voltage ice-melt disconnecting switch heavy current tester and test method, described device include pressure regulator, some switches, some Transformer Rectifier parts, for measuring test product loop current and the current measuring device of test product temperature and temperature measuring equipment, wherein pressure regulator output is divided into some branch roads, all having Transformer Rectifier parts described in switch series connection one described on every branch road, each Transformer Rectifier element outputs is parallel to test product two ends after converging.Described method includes: sets the highest temperature and appreciates；Measure test product temperature rise in certain time；Judge whether to reach temperature rise limit, determine input Transformer Rectifier parts number of units；Reduce pressure regulator output, adjust electric current；Judge whether to reach temperature rise limit；Obtain thermally-stabilised maximum temperature-rise and carrying current；Evaluate through-current capability.The present invention is easily operated, test current is big, regulation is fine, can simulate the extra-high voltage through-flow characteristic of ice-melt disconnecting switch, provides reference for actual ice-melt.
Description
Technical field
The invention belongs to electrical engineering technical field, relate to a kind of assay device for extra-high voltage ice-melt disconnecting switch cranking test and test method.
Background technology
Development along with China's electric utility, extra-high voltage grid is increasingly becoming the bulk transmission grid of whole electrical network, its transmission reliability is particularly important, extra high voltage line fed distance is long simultaneously, institute is through local climate complicated condition, easily causing serious icing tripping operation or the broken string of falling tower occur, this kind of accident once occurs, and will cause large-area power outage.
At present, most economical, the most efficient method of the loss of transmission line of electricity ice damage can be alleviated, being that transmission line of electricity is carried out electric current ice-melt work, extra high voltage line uses multiple fission conductor, and line footpath is big, reactance is high, paying the utmost attention to DC ice melting, the most required ice melting current is high, typically at more than 10000A, during ice-melt, electric current can produce serious heat effect, and this just proposes strict requirements to the through-flow characteristic of disconnecting switch.In current disconnecting switch through-current capability test, test current is relatively low, it is difficult to working condition during simulation extra-high voltage actual ice-melt of ice-melt disconnecting switch, if and it is incremental directly to carry out dilatation in original pilot system, then can be limited by assay device cooling system, cooling system in hgher efficiency is expensive.Therefore develop a set of for extra-high voltage ice-melt disconnecting switch cranking test, structurally simple, economical applicable assay device and test method, become a problem demanding prompt solution in extra-high voltage ice-melt tackling key problem.
Summary of the invention
The technical problem to be solved in the present invention is: be difficult to meet the defect of extra-high voltage ice-melt disconnecting switch test for the test of existing disconnecting switch through-current capability, a kind of assay device for extra-high voltage ice-melt disconnecting switch cranking test and test method are provided, current value corresponding when obtaining extra-high voltage ice-melt disconnecting switch temperature rise situation under different electric currents and maximum temperature-rise by test, provides powerful guarantee for safe and reliable the carrying out of extra-high voltage ice-melt.
For reaching above-mentioned purpose, the present invention is achieved by the following technical programs: the extra-high voltage ice-melt disconnecting switch heavy current tester of the present invention, including pressure regulator 1, some switches 2, some Transformer Rectifier parts 3, current measuring device 4, temperature measuring equipment 5, digital display device 6, current transformer 7, wherein pressure regulator 1 output is divided into some branch roads, every branch road all has Transformer Rectifier parts described in switch series connection one described in, each Transformer Rectifier element outputs is parallel to test product two ends after converging, the input of described current measuring device 5 is connected to each Transformer Rectifier parts 3 outfan meet by current transformer 7, for measuring the electric current flowing through test product, described temperature measuring equipment 5 input termination test product, for measuring test product temperature.
The outfan of described pressure regulator 1, current measuring device 4 and temperature measuring equipment 5 connects digital display device 6, is used for showing that pressure regulator 1 voltage x current, current measuring device 4 measure electric current and temperature measuring equipment 5 measures temperature.
The present invention utilizes the test method of said apparatus to comprise the following steps:
(1), disconnecting switch nameplate parameter is combined, the condition such as measure field ambient temperature, wind speed, set extra-high voltage ice-melt disconnecting switch maximum temperature rise value Tmax
(2), the maximum current I, this maximum current I that initial setting test product passes through is more than extra high voltage line ice melting current ultimate value according to the setting of extra high voltage line ice melting current ultimate value, I；
(3), calculate pressure regulator output, make the electric current of every Transformer Rectifier parts be I/n, n be Transformer Rectifier number of components；
(4), close the switch on a branch road, regulation pressure regulator is I/n to the Transformer Rectifier parts output electric current of this branch road, every some minutes, extra-high voltage ice-melt disconnecting switch is placed on record, record some hours interior data, and draw test product temperature rise-time graph according to record data；
(5), judge whether test current reaches capacity: according to the test product temperature rise T surveyed in described some hours of step (4)1If, this temperature rise T1Less than extra-high voltage ice-melt disconnecting switch maximum temperature rise value Tmax, then after test product cools down completely, then increase unification group switch, repeat the test procedure after closing a switch in step (4), judged by step (5) the most again；If described temperature rise T1Equal to extra-high voltage ice-melt disconnecting switch maximum temperature rise value Tmax, the most directly go to step (8)；If not arriving step (4) temperature rise T i.e. occurred in described some hours1Equal to extra-high voltage ice-melt disconnecting switch maximum temperature rise value Tmax, then terminate this test, go to step (6)；
(6), after test product cools down completely, holding closes a switch several constant, regulates pressure regulator 1, make the some percentage points of output current reduction, every some minutes, extra-high voltage ice-melt disconnecting switch is placed on record, record some hours interior data, and draw test product temperature rising-time figure according to data；
(7), judge whether electric current reaches capacity: rise T according to thermometric in described some hours of step (6)2If, T2Less than or equal to extra-high voltage ice-melt disconnecting switch setting value, then go to step (9)；If not arriving described some hours T occurs2Equal to extra-high voltage ice-melt disconnecting switch maximum temperature rise value Tmax, then terminate this test, after test product cools down completely, repeat step (6) and step (7)；
(8) if being not up to the maximum temperature T set in described some hoursmax, I in step (3) is raised several percentage points, repeats step (3) step (7)；
(9) the temperature rise T of now test product, is thought1Or temperature rise T2Thermally-stabilised maximum temperature-rise value for extra-high voltage ice-melt disconnecting switch, it is believed that the electric current that now test product flows through is extra-high voltage ice-melt disconnecting switch thermally-stabilised carrying current value, and ice melting current during actual ice-melt not can exceed that thermally-stabilised carrying current value；
(10), compare the thermally-stabilised carrying current size with rated current, evaluate the through-flow performance of extra-high voltage ice-melt disconnecting switch.
Calculating pressure regulator output in step (3), making the electric current often organizing Transformer Rectifier parts is 2000A.
Step (4) and step (6) are 10 minutes in described some minutes, step (4) is 3 hours in described some hours to step (7), and step (6) and described several percentage points some of step (8) are 2%.
The invention has the beneficial effects as follows:
1) due to the fact that to use big electric current is first shunted and conflux again, heavy-duty rectifier is carried out distributed heat removal, distribution rectifier current on every branch road is greatly reduced, can realize rising the experimental condition flowing to 20000A in existing low cost heat dissipation technology, it is possible to contain the test of almost all of disconnecting switch D.C. high-current；
2), the present invention export electric current and regulate from small to large, be provided with many progression, it is simple to find in time the problems such as loose contact, avoid ablation simultaneously；
3), test method of the present invention working condition of disconnecting switch when can accurately simulate extra high voltage line ice-melt, provide reliable reference for extra high voltage line ice-melt work, prevent disconnecting switch from occurring overheated；
4), assay device principle provided by the present invention simple, economic and practical, test method is simple and easy to do, it is easy to operation.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of extra-high voltage ice-melt disconnecting switch heavy current tester of the present invention.
Fig. 2 is Transformer Rectifier component infrastructure figure.
Fig. 3 is test product temperature rise-time plot described in step 2 in embodiment 1.
Fig. 4 is the temperature rise-time plot of test product described in step 4 in embodiment 1.
In Fig. 1, reference is:
Pressure regulator 1；Switch 2；Transformer Rectifier parts 3；Current measuring device 4；Temperature measuring equipment 5；Digital display device 6；Current transformer 7.
In Fig. 2, reference is:
Transformator 31；Commutator 32.
Detailed description of the invention
Fig. 1 reflects the structure of extra-high voltage ice-melt disconnecting switch heavy current tester of the present invention, and as can be seen from the figure the present invention includes pressure regulator 1, some switches 2, some Transformer Rectifier parts 3, current measuring device 4, temperature measuring equipment 5 and digital display device 6.If wherein pressure regulator 1 exports main line, forming some branch roads, every branch road connects one group of switch 2 and one group of Transformer Rectifier parts 3, by switch 2 control Transformer Rectifier parts 3.Pressure regulator exports ten tunnels in the present embodiment, and therefore switch 2 has ten groups, and corresponding Transformer Rectifier parts 3 also have ten groups, one group of Transformer Rectifier parts of one group of on-off control.No. ten outfan parallel connections of ten groups of Transformer Rectifier parts 3 converge and are followed by test product two ends, current measuring device 4 input is connected to ten tunnel output meets of Transformer Rectifier parts 3, temperature measuring equipment 5 input is connected to test product, digital display device 6 input parallel connection pressure regulator 1 outfan, current measuring device 4 outfan and temperature testing device 5 outfan.
Fig. 2 reflects the structure of Transformer Rectifier parts 3, and Transformer Rectifier parts 3 include transformator 31 and commutator 32, and extra-high voltage power supply is exported by commutator 32 rectification after dropping into low pressure by transformator 31 again.
In the present embodiment, pressure regulator 1 outfan is connected to digital display device 6, ten tunnel output meets of Transformer Rectifier parts 3 connect current measuring device 4 by current transformer 7 and measure electric current, several thermocouples pre-buried at easy heating on test product, the most pre-buried ten thermocouples, then being connected to temperature testing device 5, digital display device 6 shows maximum temperature.
Extra-high voltage ice-melt disconnecting switch cranking test method of the present invention, sees embodiment 1 and embodiment 2
Embodiment 1:
(1), disconnecting switch nameplate parameter is combined, the condition such as measure field ambient temperature, wind speed, set extra-high voltage ice-melt disconnecting switch maximum temperature rise as 300 DEG C, calculate pressure regulator output voltage, making every Transformer Rectifier parts output electric current is 2000A.
(2), close the first switch, and regulation pressure regulator is 2000A to Transformer Rectifier parts output electric current, test product maximum temperature rise is placed on record every 10min, records 3 hours interior data, and draws test product temperature rise-time graph according to record data, sees Fig. 3.
(3), judge whether electric current reaches capacity: temperature rise T in being surveyed 3 hours according to step (2)1, temperature rise T1, less than 300 DEG C, after switch to be isolated cools down completely, close a switch increase by a group, repeats the step after closing a switch in step (2), until the switch closed on eight branch roads, temperature rise T did not occurred by 3 hours1Equal to 300 DEG C, terminate this test；
(4), after test product cools down completely, holding closes a switch several constant, regulates pressure regulator, makes output current reduction 2%, test product maximum temperature rise placed on record every 10min, records 3 hours interior data, and draws temperature rising-time figure according to data, sees Fig. 4.
(5), judge whether electric current reaches capacity: temperature rise T in being surveyed 3 hours according to step (4)2, by 3 hours, temperature rise T does not occurs2Equal to 300 DEG C, terminate this test, after test product cools down completely, repeat step (4), after still making current reduction 2%, T in occurring 3 hours2Less than 300 DEG C.
(6) T now, is thought2Thermally-stabilised maximum temperature-rise value for extra-high voltage ice-melt disconnecting switch, it is believed that now corresponding total current, for extra-high voltage ice-melt disconnecting switch thermally-stabilised carrying current value, ice melting current during actual ice-melt not can exceed that 15360A.
(7), compare the thermally-stabilised carrying current size with rated current, evaluate the through-flow performance of extra-high voltage ice-melt disconnecting switch.
Embodiment 2:
(1), disconnecting switch nameplate parameter is combined, the condition such as measure field ambient temperature, humidity, wind speed, set extra-high voltage ice-melt disconnecting switch maximum temperature rise and be worth 300 DEG C, calculate pressure regulator output voltage, making every Transformer Rectifier parts output electric current is 2000A；
(2), the switch of the branch road that closes, regulation pressure regulator is 2000A to Transformer Rectifier parts output electric current, test product maximum temperature rise is placed on record every 10min, record 3 hours interior data, and according to record data drafting temperature rise-time graph；
(3), judge whether electric current reaches capacity: temperature rise T in being surveyed 3 hours according to step (2)1If, temperature rise T1Less than 300 DEG C, then after test product cools down completely, increase unification group switch, the switch of two branch roads that i.e. close, repeat the step after closing a switch in (2), until the 6th switch that closes, the switch of six branch roads that i.e. close, T occurs1Equal to 300 DEG C；
(4) T now, is thought1Thermally-stabilised maximum temperature-rise value for extra-high voltage ice-melt disconnecting switch, it is believed that now corresponding total current I=2000 × 6=12000A.
(5), compare the thermally-stabilised carrying current size with rated current, evaluate the through-flow performance of extra-high voltage ice-melt disconnecting switch.
Extra-high voltage ice-melt disconnecting switch heavy current tester of the present invention and test method, prove feasible reliably to fully meet design requirement through actual motion, and result of the test is that the design of extra-high voltage ice-melt disconnecting switch provides reference, and effect is obvious.
Claims (6)
1. the test method of an extra-high voltage ice-melt disconnecting switch heavy current tester comprises the following steps:
(1), combine disconnecting switch nameplate parameter, measure field ambient temperature, wind friction velocity, set extra-high voltage ice-melt disconnecting switch maximum temperature rise value Tmax
(2), the maximum current I, this maximum current I that setting test product passes through is more than extra high voltage line ice melting current ultimate value；
(3), calculate pressure regulator output, make the electric current of every Transformer Rectifier parts be I/n, n be Transformer Rectifier number of components；
(4), close the switch on a branch road, regulation pressure regulator is I/n to the Transformer Rectifier parts output electric current of this branch road, every some minutes, extra-high voltage ice-melt disconnecting switch is placed on record, record some hours interior data, and draw test product temperature rise-time graph according to record data；
(5), judge whether test current reaches capacity: according to the test product temperature rise T surveyed in described some hours of step (4)1If, this temperature rise T1Less than extra-high voltage ice-melt disconnecting switch maximum temperature rise value Tmax, then after test product cools down completely, then increase unification group switch, repeat the test procedure after closing a switch in step (4), judged by step (5) the most again；If described temperature rise T1Equal to extra-high voltage ice-melt disconnecting switch maximum temperature rise value Tmax, the most directly go to step (8)；If not arriving step (4) temperature rise T occurred in described some hours1Equal to extra-high voltage ice-melt disconnecting switch maximum temperature rise value Tmax, then terminate this test, go to step (6)；
(6), after test product cools down completely, holding closes a switch several constant, regulates pressure regulator 1, make the some percentage points of output current reduction, every some minutes, extra-high voltage ice-melt disconnecting switch is placed on record, record some hours interior data, and draw test product temperature rising-time figure according to data；
(7), judge whether electric current reaches capacity: rise T according to thermometric in described some hours of step (6)2If, T2Less than or equal to extra-high voltage ice-melt disconnecting switch setting value, then go to step (8)；If not arriving described some hours T occurs2Equal to extra-high voltage ice-melt disconnecting switch maximum temperature rise value Tmax, then terminate this test, after test product cools down completely, repeat step (6) and step (7)；
(8) the temperature rise T of now test product, is thought1Or temperature rise T2Thermally-stabilised maximum temperature-rise value for extra-high voltage ice-melt disconnecting switch, it is believed that the electric current that now test product flows through is extra-high voltage ice-melt disconnecting switch thermally-stabilised carrying current value, and ice melting current during actual ice-melt not can exceed that thermally-stabilised carrying current value；
(9), compare the thermally-stabilised carrying current size with rated current, evaluate the through-flow performance of extra-high voltage ice-melt disconnecting switch.
Test method the most according to claim 1, it is characterised in that calculating pressure regulator output in described step (3), making the electric current often organizing Transformer Rectifier parts is 2000A.
Test method the most according to claim 1 and 2, it is characterised in that described step (4) and step (6) are 10 minutes in described some minutes, step (4) is 3 hours in described some hours to step (7).
4. the extra-high voltage ice-melt disconnecting switch heavy current tester being applicable to test method described in claim 1-3, it is characterized in that this assay device includes pressure regulator (1), some switches (2), some Transformer Rectifier parts (3), current measuring device (4), temperature measuring equipment (5), wherein pressure regulator (1) output is divided into some branch roads, every branch road all has described in one and switch Transformer Rectifier parts (3) described in (2) series connection one, each Transformer Rectifier element outputs is parallel to test product two ends after converging, the input of described current measuring device (4) is connected to each Transformer Rectifier parts (3) outfan meet, for measuring the electric current flowing through test product, described temperature measuring equipment input termination test product, for measuring test product temperature.
Extra-high voltage ice-melt disconnecting switch heavy current tester the most according to claim 4, it is characterised in that the output of described pressure regulator is divided into ten branch roads.
Extra-high voltage ice-melt disconnecting switch heavy current tester the most according to claim 4, it is characterized in that the outfan of described pressure regulator (1), current measuring device (4) and temperature measuring equipment (5) is also associated with digital display device (6), be used for showing that pressure regulator (1) voltage x current, current measuring device (4) measure electric current and temperature measuring equipment (5) measures temperature.
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| CN106443096A (en) * | 2016-11-23 | 2017-02-22 | 国网辽宁省电力有限公司电力科学研究院 | Full automatic temperature rise test low-voltage big-current generator and control method thereof |
| CN111504507A (en) * | 2020-05-15 | 2020-08-07 | 辽宁东科电力有限公司 | Device and method for completing temperature rise test of multi-branch ring main unit by one-time wiring |
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| CN101820153B (en) * | 2010-03-30 | 2013-02-20 | 南方电网科学研究院有限责任公司 | System debugging method for DC ice melting device |
| CN102208792B (en) * | 2011-03-10 | 2015-05-13 | 中国电力科学研究院 | System debug method of movable type direct current ice melting apparatus based on gate turn-off (GTO) device |
| CN102255271A (en) * | 2011-07-08 | 2011-11-23 | 贵州电力试验研究院 | Low-voltage rectifying device |
| CN102510039B (en) * | 2011-11-09 | 2014-10-01 | 南方电网科学研究院有限责任公司 | Automatic switching circuit for multi-functional direct current ice melting and switching method thereof |
| CN102590664A (en) * | 2012-02-08 | 2012-07-18 | 湖南省电力公司科学研究院 | Low-voltage large-current testing platform of direct-current ice melting device |
| CN103915808B (en) * | 2014-03-07 | 2018-07-31 | 南方电网科学研究院有限责任公司 | DC de-icing device based on voltage source converter and its control method |
| CN204479717U (en) * | 2015-04-10 | 2015-07-15 | 国家电网公司 | Extra-high voltage ice-melt disconnector heavy current tester |
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